1 | // Copyright 2010 Google Inc. All Rights Reserved. |
2 | // |
3 | // Use of this source code is governed by a BSD-style license |
4 | // that can be found in the COPYING file in the root of the source |
5 | // tree. An additional intellectual property rights grant can be found |
6 | // in the file PATENTS. All contributing project authors may |
7 | // be found in the AUTHORS file in the root of the source tree. |
8 | // ----------------------------------------------------------------------------- |
9 | // |
10 | // Coding trees and probas |
11 | // |
12 | // Author: Skal (pascal.massimino@gmail.com) |
13 | |
14 | #include "src/dec/vp8i_dec.h" |
15 | #include "src/utils/bit_reader_inl_utils.h" |
16 | |
17 | #if !defined(USE_GENERIC_TREE) |
18 | #if !defined(__arm__) && !defined(_M_ARM) && !defined(__aarch64__) |
19 | // using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then. |
20 | #define USE_GENERIC_TREE 1 // ALTERNATE_CODE |
21 | #else |
22 | #define USE_GENERIC_TREE 0 |
23 | #endif |
24 | #endif // USE_GENERIC_TREE |
25 | |
26 | #if (USE_GENERIC_TREE == 1) |
27 | static const int8_t kYModesIntra4[18] = { |
28 | -B_DC_PRED, 1, |
29 | -B_TM_PRED, 2, |
30 | -B_VE_PRED, 3, |
31 | 4, 6, |
32 | -B_HE_PRED, 5, |
33 | -B_RD_PRED, -B_VR_PRED, |
34 | -B_LD_PRED, 7, |
35 | -B_VL_PRED, 8, |
36 | -B_HD_PRED, -B_HU_PRED |
37 | }; |
38 | #endif |
39 | |
40 | //------------------------------------------------------------------------------ |
41 | // Default probabilities |
42 | |
43 | // Paragraph 13.5 |
44 | static const uint8_t |
45 | CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { |
46 | { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, |
47 | { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, |
48 | { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } |
49 | }, |
50 | { { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 }, |
51 | { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 }, |
52 | { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 } |
53 | }, |
54 | { { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 }, |
55 | { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 }, |
56 | { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 }, |
57 | }, |
58 | { { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 }, |
59 | { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 }, |
60 | { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 }, |
61 | }, |
62 | { { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 }, |
63 | { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 }, |
64 | { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 } |
65 | }, |
66 | { { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 }, |
67 | { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 }, |
68 | { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 } |
69 | }, |
70 | { { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 }, |
71 | { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 }, |
72 | { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 } |
73 | }, |
74 | { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, |
75 | { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, |
76 | { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } |
77 | } |
78 | }, |
79 | { { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 }, |
80 | { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 }, |
81 | { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 } |
82 | }, |
83 | { { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 }, |
84 | { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 }, |
85 | { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 } |
86 | }, |
87 | { { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 }, |
88 | { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 }, |
89 | { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 } |
90 | }, |
91 | { { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 }, |
92 | { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 }, |
93 | { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 } |
94 | }, |
95 | { { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 }, |
96 | { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 }, |
97 | { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 } |
98 | }, |
99 | { { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 }, |
100 | { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 }, |
101 | { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 } |
102 | }, |
103 | { { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 }, |
104 | { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 }, |
105 | { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 } |
106 | }, |
107 | { { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 }, |
108 | { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, |
109 | { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 } |
110 | } |
111 | }, |
112 | { { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 }, |
113 | { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 }, |
114 | { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 } |
115 | }, |
116 | { { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 }, |
117 | { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 }, |
118 | { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 } |
119 | }, |
120 | { { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 }, |
121 | { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 }, |
122 | { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 } |
123 | }, |
124 | { { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 }, |
125 | { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 }, |
126 | { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 } |
127 | }, |
128 | { { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, |
129 | { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 }, |
130 | { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } |
131 | }, |
132 | { { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, |
133 | { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, |
134 | { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 } |
135 | }, |
136 | { { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 }, |
137 | { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 }, |
138 | { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 } |
139 | }, |
140 | { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, |
141 | { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, |
142 | { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } |
143 | } |
144 | }, |
145 | { { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 }, |
146 | { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 }, |
147 | { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 } |
148 | }, |
149 | { { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 }, |
150 | { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 }, |
151 | { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 } |
152 | }, |
153 | { { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 }, |
154 | { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 }, |
155 | { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 } |
156 | }, |
157 | { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 }, |
158 | { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 }, |
159 | { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 } |
160 | }, |
161 | { { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 }, |
162 | { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 }, |
163 | { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 } |
164 | }, |
165 | { { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 }, |
166 | { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 }, |
167 | { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 } |
168 | }, |
169 | { { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 }, |
170 | { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 }, |
171 | { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 } |
172 | }, |
173 | { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, |
174 | { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, |
175 | { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } |
176 | } |
177 | } |
178 | }; |
179 | |
180 | // Paragraph 11.5 |
181 | static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = { |
182 | { { 231, 120, 48, 89, 115, 113, 120, 152, 112 }, |
183 | { 152, 179, 64, 126, 170, 118, 46, 70, 95 }, |
184 | { 175, 69, 143, 80, 85, 82, 72, 155, 103 }, |
185 | { 56, 58, 10, 171, 218, 189, 17, 13, 152 }, |
186 | { 114, 26, 17, 163, 44, 195, 21, 10, 173 }, |
187 | { 121, 24, 80, 195, 26, 62, 44, 64, 85 }, |
188 | { 144, 71, 10, 38, 171, 213, 144, 34, 26 }, |
189 | { 170, 46, 55, 19, 136, 160, 33, 206, 71 }, |
190 | { 63, 20, 8, 114, 114, 208, 12, 9, 226 }, |
191 | { 81, 40, 11, 96, 182, 84, 29, 16, 36 } }, |
192 | { { 134, 183, 89, 137, 98, 101, 106, 165, 148 }, |
193 | { 72, 187, 100, 130, 157, 111, 32, 75, 80 }, |
194 | { 66, 102, 167, 99, 74, 62, 40, 234, 128 }, |
195 | { 41, 53, 9, 178, 241, 141, 26, 8, 107 }, |
196 | { 74, 43, 26, 146, 73, 166, 49, 23, 157 }, |
197 | { 65, 38, 105, 160, 51, 52, 31, 115, 128 }, |
198 | { 104, 79, 12, 27, 217, 255, 87, 17, 7 }, |
199 | { 87, 68, 71, 44, 114, 51, 15, 186, 23 }, |
200 | { 47, 41, 14, 110, 182, 183, 21, 17, 194 }, |
201 | { 66, 45, 25, 102, 197, 189, 23, 18, 22 } }, |
202 | { { 88, 88, 147, 150, 42, 46, 45, 196, 205 }, |
203 | { 43, 97, 183, 117, 85, 38, 35, 179, 61 }, |
204 | { 39, 53, 200, 87, 26, 21, 43, 232, 171 }, |
205 | { 56, 34, 51, 104, 114, 102, 29, 93, 77 }, |
206 | { 39, 28, 85, 171, 58, 165, 90, 98, 64 }, |
207 | { 34, 22, 116, 206, 23, 34, 43, 166, 73 }, |
208 | { 107, 54, 32, 26, 51, 1, 81, 43, 31 }, |
209 | { 68, 25, 106, 22, 64, 171, 36, 225, 114 }, |
210 | { 34, 19, 21, 102, 132, 188, 16, 76, 124 }, |
211 | { 62, 18, 78, 95, 85, 57, 50, 48, 51 } }, |
212 | { { 193, 101, 35, 159, 215, 111, 89, 46, 111 }, |
213 | { 60, 148, 31, 172, 219, 228, 21, 18, 111 }, |
214 | { 112, 113, 77, 85, 179, 255, 38, 120, 114 }, |
215 | { 40, 42, 1, 196, 245, 209, 10, 25, 109 }, |
216 | { 88, 43, 29, 140, 166, 213, 37, 43, 154 }, |
217 | { 61, 63, 30, 155, 67, 45, 68, 1, 209 }, |
218 | { 100, 80, 8, 43, 154, 1, 51, 26, 71 }, |
219 | { 142, 78, 78, 16, 255, 128, 34, 197, 171 }, |
220 | { 41, 40, 5, 102, 211, 183, 4, 1, 221 }, |
221 | { 51, 50, 17, 168, 209, 192, 23, 25, 82 } }, |
222 | { { 138, 31, 36, 171, 27, 166, 38, 44, 229 }, |
223 | { 67, 87, 58, 169, 82, 115, 26, 59, 179 }, |
224 | { 63, 59, 90, 180, 59, 166, 93, 73, 154 }, |
225 | { 40, 40, 21, 116, 143, 209, 34, 39, 175 }, |
226 | { 47, 15, 16, 183, 34, 223, 49, 45, 183 }, |
227 | { 46, 17, 33, 183, 6, 98, 15, 32, 183 }, |
228 | { 57, 46, 22, 24, 128, 1, 54, 17, 37 }, |
229 | { 65, 32, 73, 115, 28, 128, 23, 128, 205 }, |
230 | { 40, 3, 9, 115, 51, 192, 18, 6, 223 }, |
231 | { 87, 37, 9, 115, 59, 77, 64, 21, 47 } }, |
232 | { { 104, 55, 44, 218, 9, 54, 53, 130, 226 }, |
233 | { 64, 90, 70, 205, 40, 41, 23, 26, 57 }, |
234 | { 54, 57, 112, 184, 5, 41, 38, 166, 213 }, |
235 | { 30, 34, 26, 133, 152, 116, 10, 32, 134 }, |
236 | { 39, 19, 53, 221, 26, 114, 32, 73, 255 }, |
237 | { 31, 9, 65, 234, 2, 15, 1, 118, 73 }, |
238 | { 75, 32, 12, 51, 192, 255, 160, 43, 51 }, |
239 | { 88, 31, 35, 67, 102, 85, 55, 186, 85 }, |
240 | { 56, 21, 23, 111, 59, 205, 45, 37, 192 }, |
241 | { 55, 38, 70, 124, 73, 102, 1, 34, 98 } }, |
242 | { { 125, 98, 42, 88, 104, 85, 117, 175, 82 }, |
243 | { 95, 84, 53, 89, 128, 100, 113, 101, 45 }, |
244 | { 75, 79, 123, 47, 51, 128, 81, 171, 1 }, |
245 | { 57, 17, 5, 71, 102, 57, 53, 41, 49 }, |
246 | { 38, 33, 13, 121, 57, 73, 26, 1, 85 }, |
247 | { 41, 10, 67, 138, 77, 110, 90, 47, 114 }, |
248 | { 115, 21, 2, 10, 102, 255, 166, 23, 6 }, |
249 | { 101, 29, 16, 10, 85, 128, 101, 196, 26 }, |
250 | { 57, 18, 10, 102, 102, 213, 34, 20, 43 }, |
251 | { 117, 20, 15, 36, 163, 128, 68, 1, 26 } }, |
252 | { { 102, 61, 71, 37, 34, 53, 31, 243, 192 }, |
253 | { 69, 60, 71, 38, 73, 119, 28, 222, 37 }, |
254 | { 68, 45, 128, 34, 1, 47, 11, 245, 171 }, |
255 | { 62, 17, 19, 70, 146, 85, 55, 62, 70 }, |
256 | { 37, 43, 37, 154, 100, 163, 85, 160, 1 }, |
257 | { 63, 9, 92, 136, 28, 64, 32, 201, 85 }, |
258 | { 75, 15, 9, 9, 64, 255, 184, 119, 16 }, |
259 | { 86, 6, 28, 5, 64, 255, 25, 248, 1 }, |
260 | { 56, 8, 17, 132, 137, 255, 55, 116, 128 }, |
261 | { 58, 15, 20, 82, 135, 57, 26, 121, 40 } }, |
262 | { { 164, 50, 31, 137, 154, 133, 25, 35, 218 }, |
263 | { 51, 103, 44, 131, 131, 123, 31, 6, 158 }, |
264 | { 86, 40, 64, 135, 148, 224, 45, 183, 128 }, |
265 | { 22, 26, 17, 131, 240, 154, 14, 1, 209 }, |
266 | { 45, 16, 21, 91, 64, 222, 7, 1, 197 }, |
267 | { 56, 21, 39, 155, 60, 138, 23, 102, 213 }, |
268 | { 83, 12, 13, 54, 192, 255, 68, 47, 28 }, |
269 | { 85, 26, 85, 85, 128, 128, 32, 146, 171 }, |
270 | { 18, 11, 7, 63, 144, 171, 4, 4, 246 }, |
271 | { 35, 27, 10, 146, 174, 171, 12, 26, 128 } }, |
272 | { { 190, 80, 35, 99, 180, 80, 126, 54, 45 }, |
273 | { 85, 126, 47, 87, 176, 51, 41, 20, 32 }, |
274 | { 101, 75, 128, 139, 118, 146, 116, 128, 85 }, |
275 | { 56, 41, 15, 176, 236, 85, 37, 9, 62 }, |
276 | { 71, 30, 17, 119, 118, 255, 17, 18, 138 }, |
277 | { 101, 38, 60, 138, 55, 70, 43, 26, 142 }, |
278 | { 146, 36, 19, 30, 171, 255, 97, 27, 20 }, |
279 | { 138, 45, 61, 62, 219, 1, 81, 188, 64 }, |
280 | { 32, 41, 20, 117, 151, 142, 20, 21, 163 }, |
281 | { 112, 19, 12, 61, 195, 128, 48, 4, 24 } } |
282 | }; |
283 | |
284 | void VP8ResetProba(VP8Proba* const proba) { |
285 | memset(proba->segments_, 255u, sizeof(proba->segments_)); |
286 | // proba->bands_[][] is initialized later |
287 | } |
288 | |
289 | static void ParseIntraMode(VP8BitReader* const br, |
290 | VP8Decoder* const dec, int mb_x) { |
291 | uint8_t* const top = dec->intra_t_ + 4 * mb_x; |
292 | uint8_t* const left = dec->intra_l_; |
293 | VP8MBData* const block = dec->mb_data_ + mb_x; |
294 | |
295 | // Note: we don't save segment map (yet), as we don't expect |
296 | // to decode more than 1 keyframe. |
297 | if (dec->segment_hdr_.update_map_) { |
298 | // Hardcoded tree parsing |
299 | block->segment_ = !VP8GetBit(br, dec->proba_.segments_[0], "segments" ) |
300 | ? VP8GetBit(br, dec->proba_.segments_[1], "segments" ) |
301 | : VP8GetBit(br, dec->proba_.segments_[2], "segments" ) + 2; |
302 | } else { |
303 | block->segment_ = 0; // default for intra |
304 | } |
305 | if (dec->use_skip_proba_) block->skip_ = VP8GetBit(br, dec->skip_p_, "skip" ); |
306 | |
307 | block->is_i4x4_ = !VP8GetBit(br, 145, "block-size" ); |
308 | if (!block->is_i4x4_) { |
309 | // Hardcoded 16x16 intra-mode decision tree. |
310 | const int ymode = |
311 | VP8GetBit(br, 156, "pred-modes" ) ? |
312 | (VP8GetBit(br, 128, "pred-modes" ) ? TM_PRED : H_PRED) : |
313 | (VP8GetBit(br, 163, "pred-modes" ) ? V_PRED : DC_PRED); |
314 | block->imodes_[0] = ymode; |
315 | memset(top, ymode, 4 * sizeof(*top)); |
316 | memset(left, ymode, 4 * sizeof(*left)); |
317 | } else { |
318 | uint8_t* modes = block->imodes_; |
319 | int y; |
320 | for (y = 0; y < 4; ++y) { |
321 | int ymode = left[y]; |
322 | int x; |
323 | for (x = 0; x < 4; ++x) { |
324 | const uint8_t* const prob = kBModesProba[top[x]][ymode]; |
325 | #if (USE_GENERIC_TREE == 1) |
326 | // Generic tree-parsing |
327 | int i = kYModesIntra4[VP8GetBit(br, prob[0], "pred-modes" )]; |
328 | while (i > 0) { |
329 | i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i], "pred-modes" )]; |
330 | } |
331 | ymode = -i; |
332 | #else |
333 | // Hardcoded tree parsing |
334 | ymode = !VP8GetBit(br, prob[0], "pred-modes" ) ? B_DC_PRED : |
335 | !VP8GetBit(br, prob[1], "pred-modes" ) ? B_TM_PRED : |
336 | !VP8GetBit(br, prob[2], "pred-modes" ) ? B_VE_PRED : |
337 | !VP8GetBit(br, prob[3], "pred-modes" ) ? |
338 | (!VP8GetBit(br, prob[4], "pred-modes" ) ? B_HE_PRED : |
339 | (!VP8GetBit(br, prob[5], "pred-modes" ) ? B_RD_PRED |
340 | : B_VR_PRED)) : |
341 | (!VP8GetBit(br, prob[6], "pred-modes" ) ? B_LD_PRED : |
342 | (!VP8GetBit(br, prob[7], "pred-modes" ) ? B_VL_PRED : |
343 | (!VP8GetBit(br, prob[8], "pred-modes" ) ? B_HD_PRED |
344 | : B_HU_PRED)) |
345 | ); |
346 | #endif // USE_GENERIC_TREE |
347 | top[x] = ymode; |
348 | } |
349 | memcpy(modes, top, 4 * sizeof(*top)); |
350 | modes += 4; |
351 | left[y] = ymode; |
352 | } |
353 | } |
354 | // Hardcoded UVMode decision tree |
355 | block->uvmode_ = !VP8GetBit(br, 142, "pred-modes-uv" ) ? DC_PRED |
356 | : !VP8GetBit(br, 114, "pred-modes-uv" ) ? V_PRED |
357 | : VP8GetBit(br, 183, "pred-modes-uv" ) ? TM_PRED : H_PRED; |
358 | } |
359 | |
360 | int VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec) { |
361 | int mb_x; |
362 | for (mb_x = 0; mb_x < dec->mb_w_; ++mb_x) { |
363 | ParseIntraMode(br, dec, mb_x); |
364 | } |
365 | return !dec->br_.eof_; |
366 | } |
367 | |
368 | //------------------------------------------------------------------------------ |
369 | // Paragraph 13 |
370 | |
371 | static const uint8_t |
372 | CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { |
373 | { { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
374 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
375 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
376 | }, |
377 | { { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
378 | { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, |
379 | { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 } |
380 | }, |
381 | { { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, |
382 | { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
383 | { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
384 | }, |
385 | { { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
386 | { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
387 | { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } |
388 | }, |
389 | { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
390 | { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
391 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
392 | }, |
393 | { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
394 | { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
395 | { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } |
396 | }, |
397 | { { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 }, |
398 | { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 }, |
399 | { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
400 | }, |
401 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
402 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
403 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
404 | } |
405 | }, |
406 | { { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
407 | { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 }, |
408 | { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 } |
409 | }, |
410 | { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
411 | { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
412 | { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 } |
413 | }, |
414 | { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
415 | { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
416 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
417 | }, |
418 | { { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
419 | { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
420 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
421 | }, |
422 | { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
423 | { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
424 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
425 | }, |
426 | { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
427 | { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
428 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
429 | }, |
430 | { { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, |
431 | { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
432 | { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
433 | }, |
434 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
435 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
436 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
437 | } |
438 | }, |
439 | { { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 }, |
440 | { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 }, |
441 | { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 } |
442 | }, |
443 | { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
444 | { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
445 | { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 } |
446 | }, |
447 | { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
448 | { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
449 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
450 | }, |
451 | { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
452 | { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
453 | { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
454 | }, |
455 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
456 | { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
457 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
458 | }, |
459 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
460 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
461 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
462 | }, |
463 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
464 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
465 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
466 | }, |
467 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
468 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
469 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
470 | } |
471 | }, |
472 | { { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
473 | { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 }, |
474 | { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 } |
475 | }, |
476 | { { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, |
477 | { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, |
478 | { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 } |
479 | }, |
480 | { { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, |
481 | { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, |
482 | { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 } |
483 | }, |
484 | { { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
485 | { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
486 | { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 } |
487 | }, |
488 | { { 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, |
489 | { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
490 | { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
491 | }, |
492 | { { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
493 | { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, |
494 | { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } |
495 | }, |
496 | { { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, |
497 | { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
498 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
499 | }, |
500 | { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
501 | { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, |
502 | { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } |
503 | } |
504 | } |
505 | }; |
506 | |
507 | // Paragraph 9.9 |
508 | |
509 | static const uint8_t kBands[16 + 1] = { |
510 | 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, |
511 | 0 // extra entry as sentinel |
512 | }; |
513 | |
514 | void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) { |
515 | VP8Proba* const proba = &dec->proba_; |
516 | int t, b, c, p; |
517 | for (t = 0; t < NUM_TYPES; ++t) { |
518 | for (b = 0; b < NUM_BANDS; ++b) { |
519 | for (c = 0; c < NUM_CTX; ++c) { |
520 | for (p = 0; p < NUM_PROBAS; ++p) { |
521 | const int v = |
522 | VP8GetBit(br, CoeffsUpdateProba[t][b][c][p], "global-header" ) ? |
523 | VP8GetValue(br, 8, "global-header" ) : |
524 | CoeffsProba0[t][b][c][p]; |
525 | proba->bands_[t][b].probas_[c][p] = v; |
526 | } |
527 | } |
528 | } |
529 | for (b = 0; b < 16 + 1; ++b) { |
530 | proba->bands_ptr_[t][b] = &proba->bands_[t][kBands[b]]; |
531 | } |
532 | } |
533 | dec->use_skip_proba_ = VP8Get(br, "global-header" ); |
534 | if (dec->use_skip_proba_) { |
535 | dec->skip_p_ = VP8GetValue(br, 8, "global-header" ); |
536 | } |
537 | } |
538 | |